← Exit to Module 11: Collections Framework Deep Dive lessons
Module progress · 0%Lesson · 35 min
Module 11: Collections Framework Deep Dive
Lesson focusMini-Project: Contact Management System
Manage contacts using maps, sets for deduplication, and comparators for sorted views.
01 · 14 minCollections Hierarchy OverviewLocked02 · 18 minList Implementations: ArrayList, LinkedList, VectorLocked03 · 20 minSet Implementations: HashSet, TreeSet, LinkedHashSetLocked04 · 22 minMap Implementations: HashMap, TreeMap, LinkedHashMapLocked05 · 16 minQueue & Deque ImplementationsLocked06 · 12 minComparable vs ComparatorLocked07 · 12 minCollections Utility ClassLocked08 · 14 minIteration Techniques & Fail-Fast BehaviorLocked09 · 35 minMini-Project: Contact Management SystemLocked
Store contacts keyed by ID in HashMap, maintain a TreeSet for alphabetical listing.
Allow lookup by tags using Map<String, Set<Contact>>.
Persist data to JSON/CSV and import/export while handling duplicates gracefully.